You can probably order them online but I always make mine. I find a cylinder that is the right size and measure and cut the gumpaste into a crown shape, then gently wrap it around the cylinder (usually something like an oatmeal container) and place that in a larger bowl, then fill the bowl with flour so it supports it as the crown dries. Also, this way I can shape the crown in any way I want without worrying about it falling over.